Method for monitoring functionality and / or status of rotary pump

Abstract

The invention relates to a method for monitoring the functionality and / or state of a rotary pump (1), comprising the following steps: during operation (20) of the rotary pump (1) in a reference operating mode, acquiring (30) at least one operating parameter of the rotary pump (1), evaluating (40) the at least one operating parameter in order to obtain information about the functionality and / or state of the rotary pump (1), and monitoring the functionality and / or state of the rotary pump (1). And operating the rotary pump (1) in a standard operating mode (10, 70) before and / or after operating the rotary pump (1) in the reference operating mode (20) over time, the rotary pump (1) being operated in the reference operating mode at a maximum rotational speed level for at least a predetermined period of time.

Description

Technical Field

[0001] The invention relates to a method for monitoring a rotary pump. The invention also relates to a rotary pump. Background Art

[0002] Gyro pumps are known from the prior art and are used to convey fluids by means of the rotational movement of an impeller arranged in the gyro pump. The impeller is driven by means of a rotor shaft by a motor of the gyro pump. Such gyro pumps are controlled by means of a controller.

[0003] In practice, monitoring of such rotary pumps is essential to ensure that the power required by the rotary pump is achieved. A solution was sought to improve the monitoring of rotary pumps. Summary of the invention

[0004] Starting from this situation, the object of the present invention is to provide a solution with which rotary pumps can be monitored cost-effectively and with minimal downtime. In particular, the aim is to provide a solution which avoids or at least substantially reduces the disadvantages of the prior art.

[0005] The object of the present invention is achieved by a monitoring method. Advantageous designs are given in the specification and the drawings.

[0006] Accordingly, the object is achieved by a method for monitoring the functionality and / or status of a rotary pump. The method according to the proposal has the following steps:

[0007] While the rotary pump is operated in the reference operating mode, at least one operating parameter of the rotary pump is acquired,

[0008] evaluating the at least one operating parameter to obtain information about the functionality and / or status of the rotary pump, and

[0009] The swing pump is operated in the standard operating mode before and / or after the swing pump is operated in the reference operating mode, wherein

[0010] The rotary pump is operated in reference operation mode at the maximum speed level for at least a predefined period of time.

[0011] In other words, a method is proposed in particular, in which a rotary pump is placed in a monitoring state by reaching the maximum speed of the rotary pump within a certain time period, in particular temporarily, in particular after and / or before the rotary pump is operated in a normal state. During the monitoring state, one or more so-called operating parameters of the rotary pump are acquired, wherein the maximum speed naturally occurs regularly. The operating parameter or parameters are evaluated and provide information about the state or functionality or (remaining) performance of the rotary pump. Since the performance that a rotary pump can achieve at maximum speed or full load is generally known, the operating parameters acquired at maximum speed can provide this information. In particular, the predetermined time period does not last for a long time compared to the service life of the rotary pump or compared to the start-up time of the rotary pump, for example less than one minute, so that the information can be obtained quickly and the normal state only needs to be briefly interrupted or does not occur.

[0012] The key point of the proposed solution is that the functionality or status of the rotary pump can be monitored with minimal time. There is no need to shut down the rotary pump, so there is no flow accumulation. In most cases, the flow of the rotary pump even exceeds the set value, which can be easily balanced again, so that in the actual performance test, there is usually no time loss despite the monitoring of the rotary pump.

[0013] Another advantage of this solution is that existing rotary pumps can be easily retrofitted with the solution according to the invention for today's control technology. Therefore, according to the solution according to the invention, in practical applications, only the control, and therefore in most cases only the programming of the control of the rotary pump, is usually required.

[0014] A rotary pump generally refers to a fluid machine that uses rotational motion and dynamic force to convey a fluid that is mainly a liquid. In addition to the tangential acceleration of the fluid (also called a medium), the centrifugal force generated in the radial flow is also used for conveying, so the rotary pump is also called a centrifugal pump. In the normal operation of the rotary pump, the housing of the motor is preferably arranged above the pump housing, and an impeller driven by the motor through the rotor shaft is provided in the pump housing to convey the fluid, wherein the housing of the motor can be connected to the pump housing in a fixed position and / or they can be designed as an integral one. The fluid preferably includes water or other liquid media, such as wastewater. Preferably, the housing of the motor is designed from metal, especially stainless steel, and / or the pump housing is designed from plastic. Typically, the rotary pump has a motor, an impeller for conveying fluid that can be driven by the motor, and a controller, which is configured to control the motor. The rotary pump can have a frequency converter. A rotary pump without a frequency converter, i.e., a frequency converter-free rotary pump, can also be provided.

[0015] The controller, also referred to as control device, preferably comprises a microcontroller, a microprocessor, an integrated circuit or a similar electronic component, by means of which the motor of the rotary pump can be controlled, for example based on a predetermined and / or adjustable program and / or based on input information, such as sensors. The controller is in particular programmable. The controller can switch the rotary pump between a standard operating mode and a reference operating mode. The controller can control the operation performed in the respective operating mode.

[0016] An operating mode, in particular a standard operating mode or a reference operating mode, refers in particular to a state of the rotary pump.

[0017] The fluid is conveyed while the rotary pump is in operation, in particular in an operating mode of the rotary pump, i.e., for example, a standard operating mode and / or a reference operating mode. The method typically involves the operation of the rotary pump. It is also possible for the rotary pump to not convey fluid or to run dry in the standard operating mode and / or in the reference operating mode. The method can also facilitate monitoring or obtaining information.

[0018] An operating parameter is generally understood to mean a measured variable or a characteristic value, which relates in particular to the operation of the rotary pump. In a simple case, an operating parameter refers, for example, to the current delivery capacity of the rotary pump. An operating parameter can include, for example, measured data, signals and / or values. An operating parameter can be a physical or dimensional characteristic value, can be a physical variable and / or a dimensionless characteristic value. The acquisition of the operating parameter can be carried out, for example, using a controller and / or a sensor. The acquisition can also be carried out by reading a measuring table or a measuring device.

[0019] The operating parameters can be selected from the rotational speed or the rotational speed of the motor of the rotary pump, the head, the intermediate circuit voltage, the motor current, the electric power, the operating voltage, the volume flow of the rotary pump and / or the oscillation function. For the generally known rotary pump control, the intermediate circuit voltage and / or one or more motor currents and / or the electric power / power consumption and / or the operating voltage of the rotary pump may already exist or be acquired through measurement technology, so that they can be used for monitoring purposes. The volume flow delivered can also be known, because it can show the operating conditions of the rotary pump. The oscillation function can be acquired at different locations of the rotary pump, for example by means of electrical signals / variables or mechanical signals / variables, for example by means of sensors assigned to the rotary pump, such as accelerometers or similar devices. The oscillation function is usually a time-dependent function of the acceleration. The current curve and / or the voltage curve can also be acquired as a time-dependent function in order to be used as at least one operating parameter.

[0020] Evaluation usually involves manual and / or computer-assisted processing of operating parameters. For example, smoothing and / or conversion of signals. For example, operating parameters are compared with reference values ​​or reference data. In this way, conclusions can be drawn about functionality and status.

[0021] For example, during the evaluation process, it is evaluated whether the at least one operating parameter is within an admissible value range. The admissible value range can be predetermined or can also be determined based on initial measured values, for example based on a dispersion method. The oscillation spectrum or spectrum can be compared with previously determined reference states or reference data. For example, the amplitudes of each frequency can be compared here, and deviations can be determined and summed up. In particular, it can be specifically checked whether the amplitudes of the measured spectra at the selected frequencies are different. Example: Analyze the amplitude ratio of the oscillation to the first harmonic at the rotation frequency. If the amplitude ratio of the current measured value is 10% greater than the amplitude ratio at the reference measured value, an imbalance is indicated. Alternatively or supplementarily, the analysis can also be carried out using artificial intelligence (KI, künstliche Intelligenz) principles or artificial intelligence methods. A large number of reference measured values ​​or reference data (for example, obtained in the standard operating mode) form an advantageous "good" group. It is then checked in the reference operating mode whether the current measured value (i.e. the at least one operating parameter) is within this group.

[0022] Functionality and / or status usually refers to the (remaining) performance of the rotary pump. For example, information about functionality and / or status can quantify whether or to what extent the rotary pump can still achieve the expected performance.

[0023] In particular, the predetermined time period is within the time period during which the reference operating mode is operated. In other words, the predetermined time period is the shortest time during which the reference operating mode may exist. It is conceivable that a reference operating mode exists and that the delivery rate provided by the swing pump corresponds to the delivery rate in the standard operating mode. The swing pump does not have to operate continuously at the maximum speed level in the reference operating mode. Instead, it is proposed that the maximum speed level is reached at least during the duration of the predetermined time period and that the reference operating mode exists during this period, preferably also immediately after and / or before the end of the predetermined time period. It can be proposed that in the reference operating mode, the predetermined time period may predetermine the maximum time during which the maximum speed level may exist, so that lower or higher speed levels should exist before and after it.

[0024] The speed class is the speed at which a rotary pump makes one revolution per unit of time, e.g. revolutions per minute. The maximum speed class is the technically expected maximum speed or the maximum rated speed of the rotary pump, e.g. the speed usually indicated in the operating instructions and / or on the type plate. If the speed classes differ from one another, this means that the speeds of the speed classes (when compared in the same unit, e.g. rpm) are different. When two speed classes are mentioned, it can generally be assumed that the speed classes have different speeds.

[0025] According to a preferred refinement, the rotary pump is operated in the reference operating mode for a duration of at least and / or at most 10 seconds, 30 seconds, 60 seconds or 180 seconds. The duration of the reference operating mode should be greater or less than 10 seconds, 30 seconds, 60 seconds or 180 seconds. For example, the reference operating mode is maintained for exactly one minute. During this time, the maximum speed level can be reached. This ensures that the reference operating mode exists for a sufficient period of time, but not too long, in order to monitor the functionality or the state. This ensures, in particular, that the operating parameters provide reliable information and that the rotary pump is not subjected to excessive stress.

[0026] According to another preferred refinement, the rotary pump is operated in the reference operating mode at at least one further speed level for at least one further predetermined period of time. In other words, at least two speed levels are reached in the reference operating mode, wherein one, in particular exactly one of the speed levels, is associated with the maximum speed of the rotary pump. For example, the rotary pump can thereby be gradually brought up to the maximum speed or carefully guided away from the maximum speed. In particular, the rotary pump is operated at a lower speed level after or before the operation at the maximum speed level or after and before the operation at the maximum speed level. This ensures that the operating parameters can be acquired as accurately and reproducibly as possible and that the rotary pump is used as gently as possible.

[0027] According to another preferred improvement, the predetermined time period is 1 to 20 seconds, preferably 5 to 15 seconds, in particular 10±5 seconds or 10±2 seconds. It has been proven that very reliable results can be obtained in such a period of time without significantly affecting normal operation.

[0028] It is conceivable that the rotary pump is operated in the reference operating mode and at at least one further speed level for a further predetermined time period before and / or after the predetermined time period (at the maximum speed level). In this regard, if the reference operating mode is present, one or more further speed levels are added to the maximum speed level. Naturally, the further speed level (or a plurality of these speed levels) must be provided as further predetermined time periods before or after the predetermined time period in terms of time. In particular, all predetermined time periods add up to the total duration or a predetermined duration of the reference operating mode, for example 10 seconds, 15 seconds, 20 seconds, 25 seconds, 30 seconds or another number of seconds.

[0029] Optionally, a first further predetermined time period of 10±5 s and a speed of 10% to 40%, in particular 25%, of the maximum speed level are provided as the first further speed level. In other words, by way of example, the first further speed level can specify a speed of the rotary pump which is numerically one tenth to four tenths, in particular one quarter or 25%, of the maximum possible speed of the rotary pump.

[0030] Optionally, a second further predetermined time period of 10±5 s and a rotational speed of 30% to 70%, in particular 50%, of the maximum rotational speed level are provided as the second further rotational speed level.

[0031] Optionally, a third further predetermined time period of 10±5 s and a rotational speed of 50% to 100%, in particular 75%, of the maximum rotational speed level are provided as the third further rotational speed level.

[0032] Optionally, a fourth further predetermined time period of 5±3 s and a rotational speed of 10% to 40%, in particular 25%, of the maximum rotational speed level are provided as the fourth further rotational speed level.

[0033] The terms "first", "second", "third", "fourth", etc. are to be understood as proper nouns. A sequence may or may not be implied. These proper nouns are interchangeable at will.

[0034] During the further predetermined period, the rotary pump should be operated at a slower speed than during the predetermined period in order to gradually reach the maximum speed during the predetermined period. Advantageously, a state can be quickly achieved at the maximum speed level, which is achieved with high repeatability and minimal time loss. When exiting the predetermined period or finally exiting the reference operating mode, it is advantageously also possible to adjust in such a way that disruptive effects are reduced as much as possible in practice.

[0035] According to another preferred improvement, it is proposed that the evaluation includes a comparison of the at least one operating parameter with at least one reference data for a reference operating mode, in particular based on a threshold value. Thus, the operating parameter can be analyzed to determine whether it exceeds or falls below a threshold value. For example, a maximum value and a minimum value of the operating parameter can be provided as a threshold value, in which case an excess of the maximum value or a fall below the minimum value can be identified during the evaluation and can be identified and stored as useful information about functionality or status. For example, an actual delivery power as an operating parameter may mean that the rotary pump is clogged if it is lower than the expected minimum delivery power as a reference data. "Based on a threshold value" here means in particular that both exceeding and falling below the limit value are taken into account. The unit of the reference data is usually the same as that of the operating parameter, for example, there may also be no unit.

[0036] The evaluation can be performed cloud-based or with the aid of a controller assigned to the rotary pump. "Cloud-based" here means that the evaluation can be performed remotely on a server away from the rotary pump. The controller can be arranged locally on the rotary pump or physically arranged on the rotary pump.

[0037] In a preferred design, in order to save data volume, the at least one operating parameter is acquired in the form of a data segment at the corresponding rotational speed level, especially at the maximum rotational speed level. A data segment especially refers to a time period that is less than a certain / predetermined time period. A data segment is especially located in the middle and / or at the end of a certain / predetermined time period. The data segment particularly preferably includes at least the last second and / or the penultimate second within the predetermined time period (especially the predetermined time period of the maximum rotational speed level). This minimizes the required computing power, saves energy and storage space. Optionally, labor costs can also be reduced.

[0038] In a preferred embodiment, the at least one reference data for the reference operating mode is selected from the group consisting of the motor speed, the head, the intermediate circuit voltage, the motor current, the electric power, the operating voltage, the volume flow of the rotary pump and / or the oscillation function. The reference data can provide tolerances. The reference data can include minimum and / or maximum values, in particular as limit values ​​or threshold values. Experience has shown that this allows very precise information about the functionality or state to be obtained.

[0039] In a preferred embodiment, the following steps are provided: compliance with the reference operating mode is monitored during operation of the rotary pump in the reference operating mode, in particular based on a threshold value and / or by analyzing the frequency spectrum or oscillation spectrum of the at least one operating parameter. In other words, not only can the reference operating mode be activated or reached, but it can also be checked whether a required speed level (such as a maximum speed level) has been reached. In particular, compliance with an operating mode, in particular a reference operating mode, can be monitored during operation of the rotary pump. For example, it can be monitored whether a significant change in the volume flow or the delivery power in the reference operating mode has occurred, for example due to changes in the fluid system with the rotary pump. If this is the case, the measurement data or the at least one operating parameter will not be used for further analysis or evaluation. Reliability is thus increased.

[0040] In a preferred embodiment, the evaluation includes measuring the at least one operating parameter, in particular the amplitude, and storing the at least one operating parameter in a database and / or a software-based data processing system. The operating parameter can thus be mathematically analyzed. This allows very high repeatability of the results.

[0041] In a preferred embodiment, the following steps are provided: the at least one reference data is determined by analyzing the standard operating mode, wherein the at least one reference data is determined when the analysis shows that: in the standard operating mode, the time variation of the at least one operating parameter lies within a predetermined time span during a certain duration, preferably with a time span of up to 10% and / or a duration of up to 10 seconds; and / or in the standard operating mode, the oscillation spectrum of the at least one operating parameter is at least substantially reproducible; and / or in the standard operating mode, the time variation of the at least one operating parameter is at least substantially reproducible. In other words, it is provided here, for example, that the reference data is defined as the substantially stationary state of the rotary pump. Preferably, the reference data is determined in the standard operating mode and at the maximum speed level in order to achieve the best results.

[0042] In a preferred embodiment, the following steps are provided: the at least one reference data is specified by data processing and / or input, wherein the specification is performed before, during and / or after operation in the standard operating mode. Preferably, the reference data of the reference operating mode are determined in such a way that the rotary pump is operated below a minimum head, without delivery, dry and / or at a maximum speed level, in particular with a speed tolerance of ±10%.

[0043] It is also possible to determine or measure at least one reference datum in the laboratory for a plurality of rotary pumps from a product series. For example, the rotary pump can start a reference operating mode at a defined point in time or upon a trigger, whereupon the at least one operating parameter can be measured and then defined as at least one reference datum. If a plurality of rotary pumps are used, it is also possible to determine how large the dispersion is compared to the at least one reference datum in the product series, for example in order to provide a corresponding tolerance in the case of the at least one reference datum or the at least one operating parameter. The tolerance can correspond to the dispersion, or it can be lower or higher, or it can correspond to a multiple of the dispersion.

[0044] In a preferred design, the following steps are proposed: triggering so that the rotary pump enters the reference operating mode, wherein the triggering is time-controlled, event-controlled and / or carried out by a trigger signal, especially during the operation of the rotary pump in the standard operating mode. For example, the triggering can be performed once every 24 hours. For example, if it is recognized that the maximum speed level already exists in the standard operating mode, the triggering can be performed, in which case the speed level will be maintained for at least a predetermined period of time. The triggering can also be triggered internally, for example, by an internal algorithm of the rotary pump. The triggering can also be triggered externally, preferably wherein the trigger signal is received by a device independent of the rotary pump, and preferably wherein the rotary pump sends a return signal to the device regarding the existence of the reference operating mode. The independent device can be a central computer, which is used to monitor and / or control at least one, but usually multiple, rotary pumps. The connection between the rotary pump or the controller of the rotary pump and the independent device can be wireless or wired. BUS signals and / or digital inputs can be provided for triggering. BUS signals and / or digital outputs can be provided for transmitting return signals. For example, an external CM system (content management system) usually provided when applying a rotary pump can also advantageously utilize the reference operating mode.

[0045] Preferably, a plurality of different reference operating modes are provided in order to be able to provide information about the state of the rotary pump at different pump powers. Thus, an adapted reference operating mode can be selected, for example comprising a speed level that is closer to the standard operating mode. Thus, the triggering can be performed in such a way that the reference operating mode into which the rotary pump enters has the smallest difference with the preceding standard operating mode with respect to the at least one operating parameter. Although the at least one operating parameter is usually acquired at the maximum speed level, the at least one operating parameter can also be acquired at a lower speed level, which is then closer to the selected speed level in the standard operating mode. This not only saves energy, but also provides a more realistic understanding of the remaining performance of the rotary pump.

[0046] In a preferred design, the following steps are proposed: when an interruption criterion is received, the operation of the rotary pump in the reference operating mode is interrupted. In other words, for example, an interruption criterion can be provided, which is received by a controller, for example; the interruption criterion should make the reference operating mode no longer exist. In particular, the standard operating mode should be restarted after or by receiving the interruption criterion. When the interruption criterion is received, the rotary pump can be switched off. When the interruption criterion is received, the following steps can be performed alternatively or in addition: the rotary pump is operated in the compensation operating mode. When the interruption criterion is received, the following steps can be performed alternatively or in addition: the rotary pump is operated in the standard operating mode. The interruption criterion can be that at least one operating parameter reaches, in particular exceeds or falls below a deviation threshold value.

[0047] In a preferred embodiment, the at least one operating parameter is processed to provide information about a deviation in the delivery volume delivered by the rotary pump and / or a deviation in the pressure generated by the rotary pump, wherein the deviation is caused by operation in the reference operating mode. For example, due to temporary operation of the reference operating mode, more fluid may be delivered than the fluid actually delivered when the reference operating mode is not called up. In this regard, information about how much fluid is delivered in excess is preferably provided in order to provide a basis for deciding whether to correct the deviation.

[0048] In particular, it is proposed to operate the rotary pump in the compensation operating mode to compensate for deviations, preferably by temporarily adjusting (e.g. reducing or increasing) the speed, lift, intermediate circuit voltage, motor current, electrical power, operating voltage and / or volume flow of the motor. Alternatively or additionally, the rotary pump can also be operated in the compensation operating mode so that deviations of the time average value are at least substantially equalized.

[0049] For the time period during which the reference operating mode exists, the rotary pump is usually not controlled according to the control task that the customer would otherwise expect, which is usually specified in the standard operating mode. The resulting deviations should be detected and compensated using the compensation operating mode. In particular, the following scenarios come into consideration.

[0050] In the case of volume flow control, the task of the rotary pump is to keep the volume flow constant. In this case, the rotary pump can add a volume flow deviation and temporarily increase and / or reduce the set volume flow when or after exiting the reference operating mode, so that the required volume flow is delivered evenly over the entire period of time.

[0051] In the case of differential pressure control, the task of the swing pump is to keep the differential pressure constant. In this case, the swing pump can add the differential pressure deviation and temporarily increase and / or reduce the set volume flow after exiting the reference operating mode so that the required differential pressure is provided on average over the entire time period.

[0052] In the event of an interruption of the reference state, the task of the rotary pump is to determine the actual speed level to be set, in particular by means of an internal control function of the rotary pump, using the measured data or the at least one operating parameter and a predetermined setpoint value. If the resulting deviation from the reference operating mode exceeds a predetermined value (or the integral of the deviation reaches a predetermined value), the reference operating mode is exited and the rotary pump returns to the standard operating mode. It is then optionally provided that the reference operating mode is reached in the subsequent state.

[0053] Furthermore, a rotary pump is proposed, which has a controller which is designed to implement the above-described method. The controller can be designed in such a way that it is programmed specifically for carrying out the method. Therefore, not every rotary pump with a programmable controller can be regarded as the rotary pump proposed here; rather, corresponding programming must also be provided or carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The invention will be explained in detail below with reference to the accompanying drawings using preferred embodiments.

[0055] In the attached picture:

[0056] Figure 1 A schematic diagram showing a method of using a rotary pump according to a preferred embodiment of the present invention, and

[0057] Figure 2 A schematic diagram of a method for using a rotary pump according to another preferred embodiment of the present invention is shown, and the method is provided based on the cloud. DETAILED DESCRIPTION

[0058] Figure 1 and Figure 2 Each shows a rotary pump 1 having a motor, an impeller drivable by the motor for conveying a fluid, and a controller. The controller is accordingly designed to implement the method according to the invention, which allows advantageous monitoring of the rotary pump 1. Figure 2 Also shown is a cloud 2 which is provided in particular for the evaluation 40 and the triggering 15 .

[0059] refer to Figure 1 , shows a method for monitoring the functionality and / or state of a rotary pump. Here, reference numerals 10, 15, 20, 50, 60, 70 represent steps or turning points and / or triggering points in the method, which are basically carried out in chronological order. The method starts, for example, in step 10 in which the rotary pump 1 is operated in a standard operating mode, for example in this case to deliver a fluid according to customer requirements. The triggering is carried out regularly in step 15. In this regard, the rotary pump 1 enters a reference operating mode by triggering 15, which then occurs in step 20, wherein the triggering 15 is time-controlled, in particular during the operation of the rotary pump 1 in the standard operating mode 10. The transition from step 10 to step 20 is carried out regularly by increasing the speed level to the maximum speed, so that the motor runs at the maximum speed provided by technology; this usually lasts for a short time, for example less than 10 seconds. If the maximum speed level has been reached in step 10, the transition occurs essentially instantaneously.

[0060] In step 15, a trigger signal is received by a device independent of the rotary pump 1, to which the rotary pump 1 sends a return signal that the reference operating mode is present. However, the trigger 15 can also be time-based, for example every 24 hours.

[0061] Reference Figure 2 The trigger 15 can be optionally realized by the cloud 2 in such a way that the trigger 15 can be initiated by means of a trigger signal. A return signal can then be sent back from the rotary pump 1 to the cloud 2 .

[0062] A plurality of different reference operating modes are provided in order to be able to provide information about the state of the rotary pump 1 at different pump powers. The triggering 15 is usually performed in such a way that the selected reference operating mode into which the rotary pump 1 is entered has the smallest differences with respect to the operating parameters of the preceding standard operating mode 10 .

[0063] The reference operating mode will be maintained for a period of 10 seconds to 180 seconds. During the reference operating mode, the rotary pump 1 is operated at the maximum speed level or maximum speed for a predetermined period of time. Here, the predetermined period of time is exactly ten seconds or 10s.

[0064] Before and after this predetermined time period, in particular still in the reference operating mode, the rotary pump 1 is operated at a lower speed level close to the standard operating mode in a further predetermined time period. The first further predetermined time period lasting 10 s is provided with a speed of 50% of the maximum speed level as the first further speed level, at which the rotary pump 1 should be operated. The second further predetermined time period lasting 5 s is provided with a speed of 25% of the maximum speed level as the second further speed level. Optionally, further speed levels or predetermined time periods can also be provided. Therefore, the sum of all predetermined time periods here is 10 s + 10 s + 5 s = 25 s, so that the duration of the reference operating mode should be 25 s.

[0065] In step 22 , during the operation 20 of the rotary pump 1 in the reference operating mode, compliance with the reference operating mode is supplementarily monitored, in particular based on a threshold value and / or by analyzing the frequency spectrum or oscillation spectrum of the at least one operating parameter.

[0066] During the operation 20 of the rotary pump 1 in the reference operating mode, step 30 is provided. In step 30, at least one operating parameter of the rotary pump 1 is detected. At least during this period, the rotary pump 1 is operated at a maximum speed level or at a maximum speed for at least a predetermined period of time.

[0067] The at least one operating parameter is here an oscillation function, in particular containing the acceleration of the rotary pump 1 , and supplementarily a volume flow.

[0068] After and / or during the acquisition 30, the at least one operating parameter can be analyzed in step 40, in particular still during the operation 20. The evaluation 40 is provided for obtaining information about the functionality and / or the state of the rotary pump 1.

[0069] The evaluation 40 is performed in the rotary pump 1 or by means of a controller assigned to the rotary pump 1. In order to save the amount of data, the at least one operating parameter is acquired in the form of a data segment of the maximum speed level, wherein the data segment only includes the last two seconds of a predetermined time period. In other words, the oscillation function is recorded or acquired only at the ninth and tenth seconds of the predetermined time period (here 10 seconds).

[0070] refer to Figure 2 It should be ensured that the method implemented here is consistent with Figure 1 Basically the same. But Figure 1 The difference is, Figure 2 It is proposed that the evaluation 40 is performed in the aforementioned cloud 2, ie remote from the rotary pump 1. For this purpose, the at least one operating parameter is transmitted to the cloud 2, for example wirelessly or by wire. For this purpose, a dashed arrow pointing from 30 to 40 is shown.

[0071] The evaluation 40 includes a comparison 42 of the at least one operating parameter with at least one reference datum for a reference operating mode, in particular based on a threshold value. The at least one reference datum has, by way of example—as the at least one operating parameter—an oscillation function of the rotary pump 1 and a volume flow of the rotary pump 1. A comparison can be made to see whether the volume flow in the reference operating mode corresponds to the volume flow of the reference datum or to what extent the volume flow in the reference operating mode deviates therefrom.

[0072] The evaluation 40 also includes measuring 44 the at least one operating parameter, in particular the amplitude. Furthermore, it is proposed to store 46 the at least one operating parameter in a database and a software-based data processing system.

[0073] It is also proposed to interrupt 50 the operation 20 of the rotary pump 1 in the reference operating mode, in particular in the case of receiving an interruption criterion. When the interruption criterion is received, the rotary pump 1 can be switched off as required. In this case, with the reception of the interruption criterion, it is proposed to operate the rotary pump 1 in the compensation operating mode 60 or to put the rotary pump 1 into the compensation operating mode. When the compensation operating mode ends, it is proposed again to operate in the standard operating mode 70, which is essentially the same as the operation 10, so that the sequence cycle ends. Alternatively, the step of operating the rotary pump 1 in the standard operating mode 70 can also be directly executed without carrying out step 60. The interruption criterion here is that the at least one operating parameter reaches a deviation threshold value, which is done by considering whether the integral of the volume flow exceeds the threshold value.

[0074] In step 48, usually still before the interruption 50 in terms of time, it is proposed to process the at least one operating parameter in order to provide information about deviations in the delivery volume delivered by the rotary pump 1 and / or deviations in the pressure generated by the rotary pump 1. The deviations arise due to the operation in the reference operating mode 20. The deviations can be used for step 60 or operation 60 as required, which is why the dashed arrow points from 48 to 60. In this regard, the rotary pump 1 is operated in the compensation operating mode 60 to compensate for the deviations, for example by operating the rotary pump 1 so that deviations of the time average value are equalized.

[0075] In the method, steps 12 and 14 are furthermore proposed. In step 12 "determine", the at least one reference datum already mentioned is determined. This can be achieved by analyzing a standard operating mode, wherein the at least one reference datum is determined when the analysis shows that: in the standard operating mode, the time variation of the at least one operating parameter is within a predetermined time span during a certain duration, and / or in the standard operating mode, the oscillation spectrum of the at least one operating parameter is at least substantially repeatable; and / or in the standard operating mode, the time variation of the at least one operating parameter is at least substantially repeatable.

[0076] In step 14 “predetermine”, the at least one reference data is specified by data processing and / or input. The specifying 14 can be performed before, during and / or after the operation 10, 70 in the standard operating mode. In particular, the reference data are determined in such a way that the rotary pump 1 is operated below a minimum head, without delivery, dry and / or at the maximum speed level, in particular with a speed tolerance of ±10%.

[0077] The described embodiments are only examples, which can be modified and / or supplemented in various ways within the scope of the claims. Each feature used to illustrate a certain embodiment can be used in any other embodiment independently or in combination with other features. Each feature used to illustrate an embodiment of a certain category can also be used in another category of embodiments in a corresponding manner.

[0078] Reference numerals list Rotary pump 1, Cloud 2, Run (standard run mode) 10, OK 12, Given 14, Trigger 15, Run (reference run mode) 20, Monitoring 22, Get 30, Evaluation 40, Compare 42, Measurement 44, Storage 46, Processing 48, Interrupt 50, Run (compensation operation mode) 60, Run (standard operating mode) 70.

Claims

1. A method for monitoring the functionality and / or status of a rotary pump (1), characterized in that The method comprises the following steps: While the rotary pump (1) is operated (20) in a reference operating mode, at least one operating parameter of the rotary pump (1) is acquired (30), evaluating (40) the at least one operating parameter to obtain information about the functionality and / or status of the rotary pump (1), and The rotary pump (1) is operated in a standard operating mode (10, 70) before and / or after the rotary pump (1) is operated in the reference operating mode (20), wherein The rotary pump (1) is operated at a maximum speed level in the reference operating mode for at least a predetermined period of time.

2. The method according to claim 1, characterized in that The rotary pump (1) is operated (20) in the reference operating mode for a duration of at least and / or at most 10 seconds, 30 seconds, 60 seconds or 180 seconds.

3. The method according to claim 1, characterized in that operating the rotary pump (1) in the reference operating mode at at least one further speed level for at least one further predetermined period of time, and After and / or before operation at the maximum speed level, operation at a lower speed level occurs.

4. The method according to any one of claims 1 to 3, characterized in that The predetermined time period is 10±5s, and The rotary pump (1) is in the reference operating mode and before a predetermined time period: Optionally, operating at a first further predetermined time period of 10±5 s at a speed corresponding to 10% to 40% of the maximum speed level as a first further speed level, and Optionally, operating at a second further predetermined time period of 10±5 s at a second further speed level corresponding to 30% to 70% of the maximum speed level, and Optionally, operating at a third additional predetermined time period of 10±5 s at a rotation speed corresponding to 50% to 100% of the maximum rotation speed level as a third additional rotation speed level; and after the predetermined period of time: Optionally, a fourth further predetermined time period of 5±3 s is operated at a rotational speed corresponding to 10% to 40% of the maximum rotational speed level as a fourth further rotational speed level.

5. The method according to any one of claims 1 to 3, characterized in that The evaluation (40) includes a threshold-value-based comparison (42) of the at least one operating parameter with at least one reference data for the reference operating mode and / or is performed cloud-based or by means of a controller assigned to the rotary pump (1).

6. The method according to any one of claims 1 to 3, characterized in that In order to save data volume, the at least one operating parameter is acquired in the form of data segments at the corresponding rotational speed level and at the maximum rotational speed level, wherein the data segment includes at least the last second and / or the second to last second within a predetermined time period.

7. The method according to claim 5, characterized in that The at least one reference datum for the reference operating mode is selected from the group consisting of a motor rotational speed, a head, an intermediate circuit voltage, a motor current, an electrical power, an operating voltage, a volume flow and / or an oscillation function of the rotary pump (1).

8. The method according to any one of claims 1 to 3, characterized in that The method comprises the following steps: During operation (20) of the rotary pump (1) in the reference operating mode, compliance with the reference operating mode is monitored (22) based on a threshold value and / or by analyzing a frequency spectrum of the at least one operating parameter.

9. The method according to any one of claims 1 to 3, characterized in that The evaluating (40) includes measuring (44) the at least one operating parameter and storing (46) the at least one operating parameter in a database and / or a software-based data processing system.

10. The method according to claim 5, characterized in that The method comprises the following steps: The at least one reference data is determined (12) by analyzing the standard operating mode, wherein the at least one reference data is determined when the analysis indicates that: In the standard operating mode, the time profile of the at least one operating parameter lies within a predefined time span during a certain duration, wherein the time span is up to 10% and / or the duration is up to 10 seconds; and / or In the standard operating mode, the oscillation spectrum of the at least one operating parameter is at least substantially repeatable; and / or In the standard operating mode, the temporal profile of the at least one operating parameter is at least substantially reproducible.

11. The method according to claim 5, characterized in that The method comprises the following steps: The at least one reference data is given (14) by data processing and / or input, wherein the giving (14) is performed before, during and / or after operation (10) in the standard operating mode, The reference data of the reference operating mode are determined in such a way that the rotary pump (1) is operated below a minimum head, without delivery, dry and / or with a speed tolerance of the maximum speed level.

12. The method according to any one of claims 1 to 3, characterized in that The method comprises the following steps: triggering (15) so that the rotary pump (1) enters the reference operating mode, wherein the triggering (15) is performed by time control, event control and / or by a trigger signal while the rotary pump (1) is operating in the standard operating mode (10, 70), The trigger signal is received by a device independent of the rotary pump (1), and the rotary pump (1) sends a return signal to the device indicating the presence of the reference operating mode.

13. The method according to claim 12, characterized in that A plurality of different reference operating modes are provided in order to be able to provide information about the state of the rotary pump (1) at different pump powers, The triggering (15) is carried out in such a way that the reference operating mode into which the rotary pump (1) enters has the smallest difference with respect to the at least one operating parameter from the previous standard operating mode.

14. The method according to any one of claims 1 to 3, characterized in that The method comprises the following steps: When an interruption criterion is received, the operation (20) of the rotary pump (1) in the reference operating mode is interrupted (50), wherein when the interruption criterion is received: The rotary pump (1) is switched off, or a step of operating the rotary pump (1) in a compensation operating mode (60) is performed, or a step of operating the rotary pump (1) in the standard operating mode (70) is performed, The interruption criterion is that at least one operating parameter reaches a deviation threshold.

15. The method according to any one of claims 1 to 3, characterized in that The method comprises the following steps: processing (48) the at least one operating parameter in order to provide information about deviations in a delivery volume delivered by the rotary pump (1) and / or deviations in a pressure generated by the rotary pump (1), wherein the deviations are caused by operation (20) in the reference operating mode; The rotary pump (1) is operated in a compensation operating mode (60) to compensate for the deviation, by temporarily adjusting the motor speed, head, intermediate circuit voltage, motor current, electric power, operating voltage, volume flow and / or by operating the rotary pump (1) in the compensation operating mode so that the deviation of the time average value is equalized.

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